Xcode - Run Script - Create Input & Output file list of file-types to optimise build process.

input_output_list_for_file_types.sh

#!/bin/sh

# Read more at:
# https://stackedheaps.com/2023/07/02/optimise-xcode-builds-with-input-output-file-lists

# Script Arguments:
# $1 = xcfilelist name without extension. 
# 	Example: SwiftFiles
# $2 = Space separated list of file extensions (case sensitive). 
# 	Examples: "swift json"
# $3 = Optional Output directory
#	Path relative to $SRCROOT for saving xcfilelist. 
#	By default, file will be saved in projects root directory

# **********************************************************************************

# Create xcfilelist for the list of file type.

XC_FILE_LIST_NAME=$1
LIST_OF_FILE_TYPES=$2
OUTPUT_DIRECTORY=$3

if [ ! -z $OUTPUT_DIRECTORY ]; then 
    PROJECT_XC_FILE=$SRCROOT/$OUTPUT_DIRECTORY/$XC_FILE_LIST_NAME.xcfilelist
else
    PROJECT_XC_FILE=$SRCROOT/$XC_FILE_LIST_NAME.xcfilelist
fi

BUILD_XC_FILE=$DERIVED_FILE_DIR/$XC_FILE_LIST_NAME.xcfilelist
OUTPUT_FILE=$DERIVED_FILE_DIR/$XC_FILE_LIST_NAME.txt

# Since we append the content, we need to start over.
# Append and remove is not required for one file type. 
rm -f $BUILD_XC_FILE

for FILE_TYPE in $LIST_OF_FILE_TYPES;
do	

    echo "Creating xcfilelist for * $FILE_TYPE * file type"

    # Find files and append the contents to xcfilelist.
    find $SRCROOT -name "*.$FILE_TYPE" | sed -e "s#$SRCROOT#\$(SRCROOT)#;" >> $BUILD_XC_FILE

done

# Compare SRCROOT file with DERIVED_FILE_DIR file. Copy if anything has changed.
cmp --silent $PROJECT_XC_FILE $BUILD_XC_FILE || cp -f $BUILD_XC_FILE $PROJECT_XC_FILE

# Create an output file
touch $OUTPUT_FILE

# **********************************************************************************